Casing spider



June 9, 1925; 1,541,669

R. B. SUMMERS CASING SPIDER Filed NOV. 10, 1924 4 Sheets-Sheet 1INVENTOR .ATTORNEY WITNESS:

June '9, 1925. 1,541,669

R. B. SUMMERS CASING SPIDER Filed NOV. 10, 1924 4 Sheets-Sheet 2WITNESS:

ATTORNEY June 9, 1925. 1,541,669

R. B. SUMMERS GAS ING SPIDER Filed Nov. 10. 1924 4 She ets-Sheet 5INVENTOR WITNESS:

ATTORNEY R. B. SUMMERE CASING SPIDER Filed NOVv 10. 1924 4 Sheets-SheetPatented June 9, 1925.

UNITED STATES PATENT OFFICE.

Application filed November 10, 1924. Serial No. 749,070.

To all whom it may concern:

Be it known that I, ROBERT B. SUMMERS, a citizen of the United States,residing at Tulsa, in the county of Tulsa and State of Oklahoma, haveinvented new and useful Improvements in Casing Spiders, of which thefollowing is a specification.

This invention relates to a casing sup porting device for the casing ofoil wells and the like, the general object of the invention being toprovide means whereby the device will be self-adjusting, and thuspreventdamage to the casing due to an uneven arrangement of the parts.

This invention also consists in certain other features of constructionand in the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claims. r

In describing my invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure 1is a side view showing how the invention is used and with the parts heldat an incline by the jacks.

Figure 2 is a sectional view through the device.

Figure 3 is a plan view.

Figure 4 is an elevation of the inner member.

Figures 5, 6 and 7 are views showing a modification.

Figures 8, 9 and 10 are views showing another modification. I

In the drawings, 1 indicates the spider which is provided with a centralopening and 2 indicates the bowl which fits in the opening and whichcarries'the tapered ring 3 in which are located the toothed slips 4which are of arc-shape and have their outer walls tapered to fit thering with the inner walls toothed to engage a casing, such as shown atA.

As will be seen the parts are so shaped that the slips will tend to movedownwardly in the tapered ring and thus have their toothed faces pressedagainst the casing to grip the same. The bowl 2 has diametricallyarranged trunnions 5 adjacent its upper edge which engage bearingrecesses 6 in the top of the spider so that the bowl has rockingmovement in the spider and it is guided in this movement by thediametrically arranged ribs 7 on the bowl engaging the grooves 8 in thespider, the outer faces of the ribs and the inner wall of the groovesbeing curved so as to prevent play of the parts in the rocking movementof the bowl. The spider is provided with the handles 9 so that it can beattached to a crane or the like. Instead of having the bowl supported bythe trunnions, the outer wall of the bowl may be of semi-sphericalshape, as shown at 10, to engage a similar shaped wall of the opening inthe spider 1. as shown in the modification illustrated in Figures 5, 6and 7. In this case the bowl engages the curved wall of the opening inthe spider so that it is firmly supported and the ribs 7 act to preventrotary movement of the bowl in the spider.

In both cases it will be seen that the bowl is self-aligning and ifone'jack B should be raised to a greater extent than the other jack C sothat the spider would be tilted the bowl would move in the spider andthus keep the casing A straight, as shown in Figures 1 and 5. Thisarrangement of parts will prevent damage to the casing through an unevenpulling strain which tends to strip the top joint or part the casing atthe top joint. The bowl with its gripping members will align itself inthe spider if the jacks are unevenly operated so that one side of thespider is raised quicker than the other side or the dirt or mud sillsgive way or sink under the weight on one side more than the other.

. In the modifications shown in Figures 8, 9 and 10 I rotatably arrangethe ring 3' and the slips 4 in the bowl 2 so that the string of casingscan be rotated, while being supported by the device, in order to tightenthe joints between the casings by turning one casing in relation to theother to make the screw threaded connections tight. In carrying out thisarran ement I provide a member 12 which is p aced between the bowl andring and place antifriction bearings 13 between said member and thebow-l so that the member can rotate in the bowl with the minimum amountof friction. The member is provided with a flan e 14 at its'upper endwhich overlaps the owl and acts to prevent dirt and other foreign matterfrom reaching the bearings. I alsoprovide a latch member for locking themember to'the bowl when the swiveling action is not desired. These latchmeans each consists of a bracket 15 fastened to the top of the bowl andprojecting over the member so as to hold the member in place. Anangle-shaped latch bar 16 is pivoted to each bracket and is adapted toengage any one of a number of notches 17 formed in. the flange 14 of themember so as to hold the memberagainst rotary movement. The upper ,endof each latch bar is weighted, as at 18, so that the latch bar Will'beheld in either its operative or inoperative position when moved to suchposition. In Figure 8 I show ball bearings at the upper and lower endsof the member and roller bearings at the sides of the member though itwill of course be understood that ball bearings may be used at the sidesas well as at the ends.

Figure 9 shows the member 12 made of stepped formation at its exteriorand the interiorof the bowl of like formation with the ball bearings 13between the stepped parts.

I desire it to be understood that the antifriction bearin s may be ofany desired type or form so as to permit rotary movement. of thecasings, with the least possible friction on the bowl.

As before stated this arrangement will permit the casings to be rotatedso as to permit one section to be screwed to another and thisarrangement also permits the bowl to move. in the spider to align theparts as in the first construction.

It is thought from the foregoing description that the advantages andnovel features of my invention will be readily apparent.

I desire it to be understood that I may make changes in the constructionand in the combination and arrangement of the several parts, providedthat such changes fall within the scope of the appended claims.

What I claim is 1. A device of the class described comprising asupporting member, a bowl movably mounted therein, means for preventingrotary movement of the bowl in the meniber, means carried by the bowlfor gripping a casing, such means comprising a ring of tapered shapeengaging the tapered interior of the bowl and tapered slips in the ringfor engaging the casing.

2-. A device of the class described comprising a spider having anopening therein with oppositely arranged grooves in the wall of theopening, a bowl fitting in the opening and rockably supported therein,ribs on the bowl for engaging the grooves and casing engaging meansinthe b w 3. A device of the class described comprising a spider havingan opening therein with a pair of oppositely arranged grooves in thewall of the opening, a bowl having trunnions therein fitting within theopening, with the trunnions engaging bearings in the spider, ribs on thebowl for engaging the grooves and easing engaging means .n the bowl.

4. A device of the class described comprising a supporting member, abowl movably mounted therein, a member rotatably mounted in the bowl andmeans carried by the member for gripping the casing.

5. A device of the class described comprising a supporting member, abowl movably mounted therein, a member rotatably mounted in the bowl,means carried by the member for gripping the casing and anti frictionmeans arranged between the bowl and the member.

6. device of the class described comprising a supporting member, a bowlmovably mounted therein, a member rotatably mounted in the bowl, meanscarried by the member for gripping the casing, anti-friction meansarranged between the bowl and the member and means for locking thememher to the bowl when desired.

In testimony whereof I afiix my signature.

ROBERT B. SUMMERS.

